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If you launched a probe to alpha Centauri with the best available tech right now, how long would it take to get there? For eg solar sails and thrusters/nuke motors capable of getting it to say 0.02c puts it at around 200 years. 0.1c = 43y, possibly imagery in my lifetime 🤯
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And remember you have way more time to construct a much more advanced receiver in the solar system to pick up on the ultra weak return transmissions
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Watched an episode once about thus on pbs spade in YouTube where he said possible 50 years. 20 years research and 30 years travel time. Thsts was 5 years ago. Also information delay of 4 years. If everything goes to plan your looking 50 years from now say 2070s